About firmware upgrades
The appliance nodes include multiple hardware components, which have firmware installed on them. Hardware vendors release new firmware versions periodically to fix issues or to improve the security and performance of the components. These updates are made available as firmware packages. You must upgrade the firmware on the appliance nodes when new firmware packages are made available.
Each node includes an acl_info.json appliance compatibility list (ACL) file that maintains a list of latest supported firmware versions for each of the components. If the firmware version of an appliance node component does not match the version that is listed in the ACL file, alerts are generated and the node is marked unhealthy.
Note:
You can upgrade directly to the latest firmware version (n) if you are upgrading from the previous two firmware versions (n-2) or (n-1).
However, if you are upgrading from an older firmware version directly to the latest available firmware version, some of the appliance components might not upgrade successfully. In such situations, you need to follow a multi-step path and upgrade to intermediate firmware versions (n-2) or (n-1), and then upgrade to version n where n denotes the latest firmware version.
To upgrade the firmware, refer to the following steps:
See Determining if a firmware upgrade is required.
See Downloading the firmware package.
See About the firmware upgrade options.
(if required)